The name of group comes from the secret slang (argot) of closed fraternities of blind hurdy-gurdy and kobza players: "joryj" [yoryy] -- does mean "respectable", "honourable", and "kłoc" (there are pronunciation as [klotz] so [klyotz]) -- whether "piece", "hunk", "chunk", or "old man", "elder": unfortunately, the exact interpretation of the word is lost for today...

So in modern language the word-combination "Joryj Kłoc" can be interpret as "respectable, honorable man" or "cool peppers", "big nob" or simply -- "V.I.P".